Axis BTA 2100D Manual do Operador descarregar pdf (Página 95)

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the cooler has warmed to the point that it won’t condense water vapor, and

the pump is considered to be off. The DIFFUSION PUMP STATUS then

changes from COOLING to OFF.

NOTE: If the word “FAULT!” is displayed in the Vacuum Status box, click on the

Diagnostics mode button for detailed information on the cause of the fault.

The vacuum status represents the state of the diffusion pump. To precisely

identify the problem, the USER should go to the Diagnostics mode and run

"System Test to Completion”. Fault messages may appear on startup or during

normal operation.

Turn OFF main power by placing switch at rear of system into OFF (down)

position. Manually vent the system for at least 5 minutes using the lever on front

panel.

NOTE: DO NOT ATTEMPT to VENT SYSTEM by any other method (via transfer

line, foreline vacuum clamps, etc.). Rapid, improper venting of the system will

cause diffusion pump fluid to backstream into the manifold and ion trap.

Maintenance procedures SHOULD NOT BE attempted until the shutdown

program has finished!

Diffusion Pump Startup

NOTE: The Diffusion Pump System Startup sequence takes at least 30 minutes:

First, the Peltier Baffle cooler is turned on while the pump heater is left off. This

step lasts 15 minutes and allows the cooler to drop in temperature before any

pump vapors are created. When the foreline pressure reaches proper vacuum

(~500 mTorr), the pump heater is turned on. When the heater has reached

operating temperature, after approximately 15 minutes, the ion trap electronics

can be turned on.

If a diffusion pump fault occurs the system will go to the shutdown mode. The

USER may check for faults on Startup by going to the Diagnostics mode and

checking the Vacuum Status field for "Fault". "Run Tests to Completion" and

check the event window for messages.

Diagnostics Page to Determine Diffusion Pump Status

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